Hydromechanical press.



A. WILZIN.

HYDROMEGHANIGAL PRESS.

APPLICATION FILED APR. 1, 1907.

933,010. Patented Aug. 31.1909.

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A. WILZIN;

HYDROMECHANIGAL PRESS.'

APPLICATION FILED APR. 1, 1907.

933,010. v Patented Au 1,1909.

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A. WILZIN.

HYDROMEGHANIGAL PRESS.

APPLICATION FILED APR. 1, 1907.

933,010. Patented Aug. 31,1909;

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ZUzZMJJeJ, S w g Mm M w A. WILZIN. HYDROMEGHANIOAL PRESS.

APPLICATION FILED APR. 1, 1907.

933,010, Patented Aug. 31, 1909.

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A. WILZIN. HYDROMEGHANICAL PRESS. Arzmourpn rrnnn APR. 1, 1907. 933,01 0. Patented Aug. 31, 1909.

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A. WILZIN.

HYDROMBGHANIGAL PRESS. APPLICATION FILED APR. 1, 1907.

Patented Aug. 31, 1909.

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WILZIN.

ANIGAL PRESS.

L ED APR. 1, 1907.

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{Specification o!Letters1ra'tent.

ia'tented Aug. '31, 1909 a lication fllcdApxfll, cam. .SBtiii-LNQ. 866,805.

To-allwhqmlconcemw 'Be-itknown' that l, Am nes Wnmiunf 4 Rue Euntziger, Glichy, Seine, France, engid ---a :Hydronmchanical Press, of which-the iollowing ise full, clear, and exact description. 1

In :power stamping, forging and embossing presses of the usualtypeg'such as crank, camor toggle presses for instance, the strain oct the work done bythetools falls on the ripereting .parts (gears, .crank shafts, -while .in motion, and as .the stroke in :these presses :lS of definite length, these-parts as well as the main body are apt 'to bedamagedbr even fractured whenever an abnormal resistance is met with,

caused for instance by the excessive thickness or :hardness efxthe stock placed between fthe wtoolsl 9n the. other hand hydraulic .presses have been need inzcases where differences in the thickness or-msistance I of ithelstock to .be worked are iunavloidable. These --presses, owing zto ithe-r'more uniform and lessnb'rupt action of their pressure organs and the way in which the stroke adapts itself to varying thicknesses, give excellent results as regards quality. of work produced and suppression of the danger of damaging thetools and the machine, but on the other hand, their action is so excessively slow that few industriescould employ them' profitably.

The present invention has ttor its object a hydromechanically operated press that does away with the disadvantagesof thetwo forerapid production and embodying nevertheless all .the advantages of hydraulic pressure. It is essentially characterized -by the combination of: a, means for operating mechanically the toolcarrier-slidein such a way as to accomplish very rapidly the longer (idle) portion of-the working-stroke, stopping the tool at a very short distance only from the work to be acted on,with: b, means for hydraulically finish- -ing the working stroke, the hydraulic action J :is 'a side view; Fig.

lost by leakage,

very short stroke only,'and may therefore be accomplished rapidly. g.

The accompanying drawing shows by way .of example several ways of carrying the :present invention.

Figures 1 to 13' show a the hydraulic operating means is device which located ,in.

side viewyFig. 3 is a vertical section made according to line A-,A of Fig. 1. Figs. 4 to-S show a "modification in which the by draulicoperating device is situated in the table of the press; Fig. e is a front view; Fig. 5 is a back view; Fig. his .a section made according to line B-.B of Fig. 4; Fig.

8 ,is a horizontal sectionanade according ;to line G O-0f Fig. '4. Fig. 9 is .a.modification of the hydraulic operating means showing in vertical section,

a device intended to utilize the energy of an accumulator o1- qf a pump.

' Fig. 10shows in vertical secticnfa modification of the hydraulic operating means, including devices adapted to automatically replenish the liquid and also a saiety valve.

The construction shown Figs. 1 to 3 the slide; 1 is an elevation; Fig. 2--is.a

comprises a slide a niovable in "the guides 19 :indreceiving a reciprocating motion by the following means-.z-At.the'upperend of this slide are pivoted the two connecting .rodsc, c operated the two intermediary crankslmftsd,d ;rthe latter carry each at one of its ends a gear wheele, e",i=n mes through intermediate pinions .f,.-f with double rack g which receives reciprocating motion from a cam h keyed upon the driving shaft 2'.

Clutch .7 permits of connecting or discennesting shaft c' with the fly-wheel ,Slide (1 is bored-out to form a cylinder, in which is fitted allarge. piston Z supported by spring-s m interposed between lugs a of the slide a and nuts 1 on the rods Z carried by the flange l of piston l and .passing freely through lugs 17. .The lower .iiace of piston Z forms the.- punch'holder for the punch or i Into the bore of slide a, which is entii ely filled with lh gid, projects plunger n which receives reciprocating motion from connecting-rod 0 operated by crank 2' of driving 0 may be co nof two parts acting as shaft 2'. The connecting-rod posed, as shown in the drawing, connected together by a spring 0 a pressure limiting device.

The operation of this press is lows :-Supp'osing theslide a tobe at the top of its stroke and the driving shaft '5 as folof the cam maintains these lows:The table part to rack g a downward motion, which the latter transmits through the pinions f,

f and tQOthGdrWhBGlS e, 6 thus causing an angular displacement of the two intermediate shafts d, d which communicate through the toggle-levers 0, a a downward displacementto the slide. a and consequently to the piston Zheld in the latter. In this way the punch is quickly brought down very close to the work to be acted upon, without any ar or strain, as the slide is stopped before the tool touches the work. .The cranks of the two shafts d, d form with the levers c, 0 connected thereto le-joints which in their straightened posltion (shown in Fig. 3) are adapted to'transmit directly to the frame of the press, without the intervention of any mov' g parts-,; such pressure as is subsequently brought to bear against-them by the action of the tool. The circular part consequently the slide a for a certain time in stationary position at the bottom of the stroke. During this time, the plunger n, actuated by the shaft i,.is forced into the 'quid filling the chamberbetween piston l and slide a. Piston l under the action of the pressure thus transmitted to the liquid and which is increased in the ratio of the diameter of piston l to piston n, is forced down, carrying the placed on the die, and thus accomplishingthe stamping, embossing or forging by hydra'ulic pressure. t 1 After the toolhas performed its work, plun er n rises, while slide a is still" at a.

'stan still thus allowin springs m (which 4o had been compressed i e forcing out pisw ton l) to push back into the slide a the piston Z, relieving the punch from contact with the pressedwork. At this moment cam h lifts therack g which throu h pinions e, e and f, f causes an anfilllar isplacement of shafts. (1, d thus brea g the straight line position of the toggle-levers a, c and quickly raisingthe slide to its highest point. The tools being now far apart, the stamped piece may be readily removed and another one placed, ready for the next workin' stroke, which is caused by depressing the lever which acts upon clutch j.

Figs. 4 to 8 show a modification in which the hydraulic operating device is located in effected here throug the cams e and e, act- 'ing through the medium of the rod 9- upon the upper member of the toggle-lever.

' The hydraulic operation is effected as folof the press is' bored out so as to form a c inder for the large piston L to move upand down in. Theu ger face of this piston L forms the die be econd in a ateral municates with the large cylinder. Into this second 0' linder p projects a plunger N :the screw studs 8 toggle-j oints and 'N punchagainst the work fication, m'the case the die. cam Z lowers the valve 1), so as to'close thel is pulled up cylinder p of smaller diamete'n'is bored out pro ection of table p and comactedon y the cams 11. It through the connecting rod 0;

w E our springs surrounding the plunger L down against the adjusting screws 8. The. operation is similar to that of the foregoing press. j

When the cam-actuated toggle-slide has brought the tool down close to, the work to be acted upon,.the} plun er N is forced into the small cylinder. 12 t e large-piston L is thereby raised under'the pressure transmitted by the fluid and the toolit carries exerts its action upon the piece inst the punch fastened on the bottom of s ide A, whlch at the time is in its lowest position and at a standstill. After the work is done, plunger rises, the sprin around studs 8 ush backthe plunger I untilit meetsthe uttscrews 8 thus relieving the stamped piece from pressure and slide raised to its highest position by the action of cams e and e.

'An' accumulator or' a ressure ump may be used instead of the p p unger N vin connectionwith hydromechamcal presses of my invention.

Fig. 9 shows the a filication of this'modiw ere the hydraulic op erating device is located in the slide.

Into the cylinder of'the pump formed by the slide A opens a condu1t s, connected at its other end with two.conduits t, a, the one of which t is connected with theaccumulator, and supplies the water under pressure, while the other u constitutes the exhaustpipe. A double-acting valve '0 is interposed between the two points where. these conduits t, u join the main conduit 8. .The stem of the valve a isconnected with the end of a lever w, pivoted on stud 10 and actuated through roda: by the cam i on shaft 2'.

The operation. is as follows :While the fastened in the table force to be worked, which .1s pressed on its other face a A is then rapidly mechanical operating device carries down the slide A, the valve *0 closes the conduit it, so as to interrupt any communication between the pump-cylinder in slide. A and the accumulator or pressure ump. When the slide A 'has reached the ttom of its stroke, the cam i raises valve '0 so as to close the exhaust and allow the admission into the cylinder of the Water under pressure sup plied'from the accumulatoror pump. Under this pressure piston Z (corresponding to Z, .Fig. v3) is forced down and with it the punch, thus stamping the work placed on -When the work is completed, the

admission and open the exhaust; the piston by its springs m, 'reassumcs,

its-initial ipositiomtin -the slidc arrd the water the conduit u.- Arsimi-lar device may be useddn case. of-thehydraulic operating device'beinglocatedin the table of the press.

F1 shows a device adapted-torepleen 'isht e liquid lost byleakage and also a safety valve to liinitthevpressure' as may be required.

The replenishing tank Z is filled with liquid and communicates with the small pres sure cylinder 17* by conduit a. As soon as a partial void is occasioned by leakage be neath 129, the pressureof the column of liquid in Zactin against the very. light spring which 1101 s up valve 2 forces this valve down and causes a complete filling up of cylinder 39 A similar replenishing apparatus may be applied to presses having the hydraulic pressure device'in the slide (as per Figs. 1 and 3) instead of the table. This replenishing device in connection with the sa ety device renders it possible to insure the requisite -degree of uniform pressure,

even in the case of leaky joints and varying thicknesses, for which purpose it will only ,be necessary to so adjust the screwss, asa starting'point for the plunger to rise from, that the die which it carries will have a tendency to move somewhat beyond the point -Which the work or the tools call for. As

soon as the rising lower tool encounters the positive resistance of the punch or the work and the pressure t us' engendered in conduit 2 rises beyond w at safety valve z vi s set for, this valve will open, letting the surplus liquid escape through canal 2 into tank Z. The partial void thus occasioned in cylinder p upon the return stroke of plunger n is promptly replenished by the valve 2 opening under the pressure of the column of liquid in Z. In this manner an excessive length of stroke may be utilized every time to be sure of carrying the pressure down'home in spite of leakage and notwithstanding defi-.

clencies in bulk or thickness of the piece interposed between the tools.

slide or hydraulic plungers, but declare the nature of my invention to be determined by the following claims:

Claims. j

1. In a machine of theclass described, in combination, a tool carrier, mechanical devices for rapidly "bringing the same to a point very close to but not touchin .the work, and maintaining the same rigi ly at rest: at that point, and a hydraulic device for .efiecting the working pressure upon the work during the stand-still of the carrier.

2. In amachine of the class. described, in combination, a tooLcarrier, mechanical devices for rapidly bringing the same to a admit liquid very close to but not touchin the 'forcediback'i by. the" piston escapesthrough work, and maintainingrthe sam'e rigi ly at ?rest at; that point, and a hydraulic device for eifecting: the working pressure upon the work during the standstillof the carrier, jsaiddevioes being'arranged to first relieve lthe work"fromhydraulic pressure and then to open up the spacemechanically.

3; In a-machine of the class described, in combination, a tool carrier, toggle mechanism for rapidly moving said carrier to bring the tool very close to but not touching the work, the toggles being straightened out and at rest at such point, so as to transmit any pressure on the tool directly to the main body of the ress, and a hydraulic device for effecting t e working pressure upon the work during this stand-still of the carrier.

4. In a machine of the class described, in

combination, a tool carrier, mechanical devices for rapidly bringing the same to a point very close to but not touchin the work, and maintaining the same rigi ly at rest at that point, and a hydraulic device for effecting the working pressure upon the work durin the stand-still of the carrier, said mechanical devices being applied to one of the tools, and said hydraulic device to the other tool.

5. In a machine of the class described, in

combination, an upper tool carrier, toggle mechanism for moving said carrier rapi ly to a pointy very close to but not touching the work, at which point the toggles are straightened out and at rest, and a hydraulic cylinder and iston serving to operate the lower tool to'e ect the working pressure upon the work during the stand-still of the upper tool.

6. In a machine of the class described, in combination, a hydraulic device for effecting the working pressure and including a pressure plunger, a replenishing tank communicating with the chamber into which the pressure plunger rojects, a valve arranged to admit liquid rom the replenlshmg tank to said chamber whenever there is a partial 1 void therein, and a valve allowing liquid to I donot limit my invention to the de scribed means of operating the tool carrier .voidtherein, and a vaive allowing liquid to escape from said chamber to said rplenishing tank whenever the tool encounters a resistance greater than that which is called for by the work to be accomplished, said plunger being arranged to hat ea determined stroke The foregoing specification of my press in excess of that necessary to effect the workwith hydromechamc deiriee signed by, me u) ing movement of the tool, so as to expel l iqthis nineteenth day of March';l9() 7. I

u1d from said chamber nto the replemshmg v tank and to return liquid from the replenishing tank to said .chamber at each opera- Witnesses: tion, so as to insure always a suflicient quan- HANSON (1Com, tity of liquid in the chamber. MAURICE HIRIGNE'r. 

